<template>
  <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
    <template v-slot:right>
      <a @click="toggle(-1)" href="javascript:;" class="iconfont icon-angle-left prev" :class="{disabled:index===0}"></a>
      <a @click="toggle(1)" href="javascript:;" class="iconfont icon-angle-right next" :class="{disabled:index===1}"></a>
    </template>
    <div class="box" ref="target">
      <ul class="list" :style="{transform:`translateX(${-index*1240}px)`}" v-if="brands.length">
        <li v-for="item in brands" :key="item.id">
          <router-link to="/">
            <img :src="item.picture" alt="">
          </router-link>
        </li>
      </ul>
      <transition name="fade">
        <div class="skeleton">
          <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px" height="305px"></XtxSkeleton>
        </div>
      </transition>
    </div>
  </HomePanel>
</template>

<script>
import { findBrand } from '@/api/home'
import { useLazyData } from '@/hooks'
import { ref } from 'vue'
import HomePanel from './home-panel'
// import { useLazyData } from '@/hooks'
export default {
  name: 'HomeBrand',
  components: {
    HomePanel
  },
  setup () {
    // 获取数据
    /* const brands = ref([])
    findBrand(10).then(data => {
      brands.value = data.result
    }) */

    // 数据懒加载
    // 注意：useLazyData需要的是API函数 如果遇到要传参的情况 自己写函数调用API
    const { result, target } = useLazyData(() => findBrand(10))
    // 切换效果 只有两页 索引值为0 1
    const index = ref(0)
    const toggle = (step) => {
      const newIndex = index.value + step
      if (newIndex < 0 || newIndex > 1) return
      index.value = newIndex
    }
    // 1.点击上一页
    // 2.点击下一页
    return { brands: result, target, index, toggle }
  }
}
</script>

<style lang="less" scoped>
.home-panel{
  background-color: #f5f5f5;
}
.iconfont{
  width: 20px;
  height: 20px;
  // background: #ccc;
  color: #fff;
  display:inline-block;
  margin-left:5px;
  background-color: @xtxColor;
  &::before{
    font-size: 12px;
    position: relative;
    top:-2px;
    right:-3px;
  }
  &.disabled{
    background: #ccc;
    cursor: not-allowed;
  }
}
.box{
  display:flex;
  width: 100%;
  height: 345px;
  overflow:hidden;
  padding-bottom: 40px;
  .list{
    width: 200%;
    display:flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n){
        margin-left: 0px;
      }
      img{
        width: 240px;
        height: 305px;
      }
    }
  }
}
.skeleton{
  width: 100%;
  display:flex;
  .item{
    margin-right: 10px;
    &:nth-child(5n){
      margin-right: 0;
    }
  }
}
</style>
